Motorcycle frame



FIG. 1 shows a motorcycle frame as applied to a motorcycle;

FIG. 2 shows a underside perspective of the motorcycle frame of FIG. 1;

FIG. 3 shows a left-hand side view of the motorcycle frame of FIG. 1;

FIG. 4 shows a right-hand side view of the motorcycle frame of FIG. 1;

FIG. 5 shows a top view of the motorcycle frame of FIG. 1;

FIG. 6 shows a bottom view of the motorcycle frame of FIG. 1;

FIG. 7 shows a front view of the motorcycle frame of FIG. 1; and,

FIG. 8 shows a rear view of the motorcycle frame of FIG. 1.

The broken lines showing other portions of a motorcycle illustrate environmental structure that forms no part of the claimed design. 

We claim the ornamental design for the motorcycle frame, as shown and described. 